/*!	 keyframesetdelta.cpp
**	 Template File
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/general.h>

#include "keyframesetdelta.h"
#include "keyframeset.h"

#include <synfigapp/localization.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;
using namespace synfigapp;
using namespace Action;

ACTION_INIT(Action::KeyframeSetDelta);
ACTION_SET_NAME(Action::KeyframeSetDelta, "KeyframeSetDelta");
ACTION_SET_LOCAL_NAME(Action::KeyframeSetDelta, N_("Set Keyframe Delta"));
ACTION_SET_TASK(Action::KeyframeSetDelta, "set");
ACTION_SET_CATEGORY(Action::KeyframeSetDelta, Action::CATEGORY_KEYFRAME | Action::CATEGORY_HIDDEN);
ACTION_SET_PRIORITY(Action::KeyframeSetDelta, 0);
ACTION_SET_VERSION(Action::KeyframeSetDelta, "0.0");
ACTION_SET_CVS_ID(Action::KeyframeSetDelta, "$Id$");

Action::KeyframeSetDelta::KeyframeSetDelta():
    delta(0)
{
    keyframe.set_time(Time::end());
    set_dirty(false);
}

Action::ParamVocab
Action::KeyframeSetDelta::get_param_vocab()
{
    ParamVocab ret(Action::CanvasSpecific::get_param_vocab());

    ret.push_back(ParamDesc("keyframe", Param::TYPE_KEYFRAME)
                  .set_local_name(_("Keyframe"))
                 );
    ret.push_back(ParamDesc("delta", Param::TYPE_KEYFRAME)
                  .set_local_name(_("Delta"))
                 );

    return ret;
}

bool
Action::KeyframeSetDelta::is_candidate(const ParamList &x)
{
    return candidate_check(get_param_vocab(), x);
}

bool
Action::KeyframeSetDelta::set_param(const synfig::String& name, const Action::Param &param)
{
    if (name == "keyframe" && param.get_type() == Param::TYPE_KEYFRAME) {
        keyframe = param.get_keyframe();
        return true;
    }

    if (name == "delta" && param.get_type() == Param::TYPE_TIME) {
        delta = param.get_time();
        return true;
    }

    return Action::CanvasSpecific::set_param(name, param);
}

bool
Action::KeyframeSetDelta::is_ready()const
{
    if (keyframe.get_time() == Time::end()) {
        return false;
    }

    return Action::CanvasSpecific::is_ready();
}

void
Action::KeyframeSetDelta::prepare()
{
    KeyframeList &list = get_canvas()->keyframe_list();
    KeyframeList::iterator next = list.find(keyframe);
    ++next;

    if (next != list.end() && fabs(delta) > 0.00000001) {
        for (KeyframeList::iterator i = next; i != list.end(); ++i) {
            Keyframe keyframe(*i);
            keyframe.set_time(keyframe.get_time() + delta);

            Action::Handle action(KeyframeSet::create());
            action->set_param("canvas", get_canvas());
            action->set_param("canvas_interface", get_canvas_interface());
            action->set_param("keyframe", keyframe);
            assert(action->is_ready());

            if (!action->is_ready()) {
                throw Error(Error::TYPE_NOTREADY);
            }

            if (delta > 0) {
                add_action_front(action);
            } else {
                add_action(action);
            }
        }
    }
}